1231231321333 has 16 divisors (see below), whose sum is σ = 1333822291200. Its totient is φ = 1129776633216.

The previous prime is 1231231321301. The next prime is 1231231321357. The reversal of 1231231321333 is 3331231321321.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1231231321333 - 2⁵ = 1231231321301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231231321373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2621016 + ... + 3054862.

It is an arithmetic number, because the mean of its divisors is an integer number (83363893200).

Almost surely, 2^{1231231321333} is an apocalyptic number.

1231231321333 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1231231321333 is a deficient number, since it is larger than the sum of its proper divisors (102590969867).

1231231321333 is a wasteful number, since it uses less digits than its factorization.

1231231321333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435156.

The product of its digits is 5832, while the sum is 28.

Adding to 1231231321333 its reverse (3331231321321), we get a palindrome (4562462642654).

The spelling of 1231231321333 in words is "one trillion, two hundred thirty-one billion, two hundred thirty-one million, three hundred twenty-one thousand, three hundred thirty-three".